Electric heater for shoe-operatives&#39; knives.



No. 893,783. PATENTED JULY 21, 1908.

E. N. GHANDLER.

ELECTRIC HEATER FOR SHOE OPERATIVES KNIVES. APPLIoATIoN FILED APR.'16.1908.

' To -aZZ whom it may concern:

,State of 35 insulation 5.

UNITED sTATnsrArnNr onirica.

EDWIN N. CHANDLER, OF BROCKTON, MASSACHUSETTS, ASSIGNOR TO Sl'MPLlCX ELECTRIC HEATING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ELECTRIC HEATER FOR SHOE-OPERATIVES KNIVES.

Beit known that I, EDWIN N. CHANDLER, a citizen of the United States, residing at Brockton, .in the county .of Plymouth and Massachusetts, have invented an Improvement in Electric Heaters for Shoe- Operatives Knives, of whichl the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

In shoe factories, knives shaped somewhat like putty knives are commonly used by the operatives in working on crippled shoes, repairing patent leather shoes, etc., and at present theseknives are commonlyT heated 1n the flame of a lamp, with attendant fire risk, danger of overheating the knives, etc. The object of my invention is to provide a simple and inexppnsive electric heater for maintaining the nives at the desired uniform temperature.

In the accompanying drawing, in which I have shown a preferred embodiment of my invention, Figure 1 isa top planview thereof g and Fig. 2 a central vertical section.

On a suitable base 1, which may he of insulating material, wood, marble, ebnite, or any other suitable material, is mounted a stand, herein shown as having three legs, 2, to

whose upper end is secured a transverse plate or support 3, preferably of iron, which may or may not contain heating resistance wires, being herein shown as containing said resistance wires 4 embedded in usual orcelain or glass Above said iate 3 is a heating plate -or table 6, preferab y of iron or other superior heat conductive material, secured by any suitable means, as by a screw 7 passing through a central hub 8 ofthe plate 3 into a depending hub orboss 9 of the table 6.n

On the under side of the latter are heating wires 10 embedded in porcelain or glass 11, in usualmanner, retained and protected by depending fianges 12 which preferably fit over corresponding flanges 13 of the plate 3,

thereby tightlypclosing in the contained heating apparatus. A rheostat 14 of any usual construction, is provided on the base 1, supplied with current by wires 15, 16, and lcontrolled by a usual handle 17. A plug 18 is shown for convenience of circuit connection with any lamp socket. cr other yconvenient socket. Above the table 6 I secure a s ring disk 19 which is hollow on its under side slightly spheroidal, being held up at its Specification of Letters Patent. n Application filed April 16, 1908. Serial No. 427,332.

`the blade to be heated very quickly.

21. .cast as one piece, to constitute a stand for the Patented J'uly 21, 1908.

I center by a washer 20 and clamped or sprung down onto the table at its peri hery by a central screw 21, additional sti ness being provided by a similar but smaller disk 22.

In use, a knife blade 23 is. shoved along the surface of the table 6 beneath the s ring disk 19, with the result that it is pinche down r held down tightly flat against the top surface of the table 6.' This direct contact causes Knives may be stuck under the spring holding plate' 19 all around its peri hery, so that the apparatus is ca able of ho ding quite a number of knives at t e same time. The holding members 19 22 are thin and yielding, so that it is not difficult to shove the sharp edge of the knife under the Vedge of the disk 19 simply by scraping it along the table 6.

I am aware that heating devices of various forms have been prov-ided, and accordingly I do not claim the same broadly.'l

My invention'is a workshop convenience, designed to facilitate the heating ofworkmens knives, and provide means for maintaining the knives atall times ready for instant use. The knives radiate around from the heating table in positionto be readily grabbed, and the apparatus is of course of such a construction and shape that it will serve a number of workmen at theV same time. Its construction is such that it is exceedingly durable and cannot readily be injured. The tension of the holding s rings or disks is readily varied by adjusting t e screw Preferably the lugs 2 and -plate 3 are a paratus,l and the peripheral flanges 12 of tffe table rest on lugs or shoulderedl projections 24 projecting from the plate 3.

Having described my invention, what I claim as new and desire to secure by Letters Patent bf the United States is, 1. An'electric knife-heater, having a flat top table, a yielding plate clampedI against the top of the table to receive beneath it the blade of a knife and h'old the same down fiat l directly against the heating surface of thetable, and electric heating means for maintaining said table hot.

2. A knife-heater, having a flat top table of heat` conductive material, a yielding holding plate centrally clam ed to said table and havmg its peripheral e ges normally inl f ngagement with the table but capable of yielding away fromthe table to receive knifev -with the table but capable 2 sessblades and clamp against the table, the table hot.

3. A knife-heater,

plate held at its middle away from the table and having its peripheral edges depending in normal clamping engagement with the table, a clamping spring above said clamping late said peripheral them in direct contact flat and means for maintaining having anilat top table of heat conductive material, a yielding holdengaging the latter adjacent ing plate arch shaped in crossv` section, ceni edges7 and means centrally clamping said trally clamped to said table -and having its spring and plate to the table. peripheral edges normally in engagement 6. A knife-heater, comprising a base, a

of yielding away from the table to receive knife blades and clamp them in direct contact ilat against the table, and means for maintaining the table lstand projecting therefrom, a heating table of heat conductive material supported on said stand, a yieldin plate centrally supported above said tab e and having its edges normally in clampingengagement with the table to receive and clampi a knife blade against the heating surface of 'the table, electric heating resistance in said table, and a rheostat permanently mounted on said heater for controlling said resistance.

In testimony whereof, I have signed my 4. A knife-heater, comprising a table of i heat conductive material, a clamping plate archv sha ed in cross section, supporting means ho ding the middle of said plate away from the table, means cooperating therewith in clamping the plate with its peripheral edges normally against the table to receive name to this specification, in the presence of knife blades and hold them tight down l two subscribing witnesses.` against the heating surface of the table, and EDNN N. CHANDLER.

means for maintaining the table hot. Witnesses 1` 5. A. knife-heater, comprising a heating CLARENCE L. RANDALL, table, means to heat the same, a clamping F. M. BIXBY. 

